x/80 - x/100 = 6 x/9 + 1 = x/6 - 1

问题描述:

x/80 - x/100 = 6 x/9 + 1 = x/6 - 1

x/80 - x/100 = 6
俩边同乘20得
x/4-x/5=120
x/20=120
x=2400
x/9 + 1 = x/6 - 1
x/6-x/9=2
俩边同乘3得
x/2-x/3=6
x/6=6
x=36